Hi
i find it and remove logo but still will not let me put more menu items.

see in admin information

1, Please edit file /layouts/left-main-right.xml find this code:

<menu html5tag="nav" order="2" id="yt_menuwrap" >
<positions>
<position class="col-md-2 col-sm-2 col-xs-3" type="feature" >@logo</position>
<position class="col-md-8 col-sm-6 col-xs-2" type="feature" >@mainmenu</position>
<position class="col-md-2 col-sm-4 col-xs-7" type="modules" style="ytmod" >search</position>
</positions>
</menu>

edit to:

<menu html5tag="nav" order="2" id="yt_menuwrap" >
<positions>
<position class="col-md-10 col-sm-6 col-xs-2" type="feature" >@mainmenu</position>
<position class="col-md-2 col-sm-4 col-xs-7" type="modules" style="ytmod" >search</position>
</positions>
</menu>